Johannesburg Water Quality
Latest water quality information for Johannesburg, California
Last update on March 2025
Unsafe water with serious health risks.
Exceeds 1 EPA limits and 5 recommended standards.
Contaminants exceeding EPA limits
What it means: This refers to substances in the water that are found at levels higher than what the EPA allows. The EPA (Environmental Protection Agency) is a U.S. government agency that sets legal limits for harmful contaminants to protect public health. Exceeding these limits means the water may pose health risks based on federal safety standards.
Arsenic
16.40 ppbPotential Health Effects
Cancer
Contaminants exceeding recommended standards
What it means: This refers to substances in the water that are above health-based guidelines set by organizations such as the World Health Organization (WHO) and the U.S. Environmental Protection Agency (EPA). These standards, while not always legally enforceable, are based on scientific research to protect health. Exceeding them may indicate potential health concerns.
Bromoform
1.70 ppbPotential Health Effects
Cancer
Dibromochloromethane
0.8000 ppbPotential Health Effects
Cancer
Perchlorate
1.20 ppbPotential Health Effects
Thyroid disruption
Total Thms
5.90 ppbPotential Health Effects
Cancer
Other Detected Contaminants
| Contaminant | Detected Level | EPA Limit | Recommended | Status |
|---|---|---|---|---|
| No additional contaminants detected. | ||||
How to best protect from water pollution?
Reduce your water pollution exposure in California
Carbon Filter
Carbon filters are effective at removing many common contaminants including chlorine, sediment, volatile organic compounds (VOCs), and improves taste and odor.
Reverse Osmosis
Reverse osmosis systems can remove up to 99% of dissolved contaminants from water including heavy metals, fluoride, nitrates, and arsenic.